Intermittent Fasting: What the Science Actually Says

Forgetting what you were about to say mid-sentence, struggling to concentrate on a task that once felt effortless, or feeling mentally sluggish despite a full night of sleep, these are not just signs of a busy or stressful period. They are the hallmark experiences of brain fog, a condition that affects a significant portion of the adult population yet is frequently dismissed as nothing more than tiredness or distraction.

● Author

Dr. Parth Nagda

Psychiatry  ·  Mental Health

Consultant, Psychiatry  ·  Adult & Child Mental Health

MBBS, MD Psychiatry  ·  KDAH Navi Mumbai  ·  English, Hindi, Marathi, Kannada, Kutchi

---

5+

Years Exp.

7+

Publications

5

Languages

IPS

Member

👤 Book an Appointment

Brain fog is not a diagnosis in itself. It is a symptom cluster, a collection of cognitive complaints that signal the brain is not functioning at its usual capacity. Its causes are varied, it can be temporary or persistent, and its severity ranges from mildly inconvenient to significantly disabling. Understanding what brain fog is, what drives it, and when it warrants medical attention is important for anyone who has experienced it and is unsure what to do next.

What Is Brain Fog?

Brain fog is a term used to describe a group of cognitive symptoms, including poor concentration, memory lapses, mental fatigue, slowed thinking, and difficulty processing information, that affect a person’s ability to function normally in daily life.

It is not a medical diagnosis in the traditional sense. There is no single test that confirms brain fog, and it does not appear as a standalone entry in clinical classification systems. Rather, it is a presentation, a subjective experience of cognitive impairment, that can result from a wide range of underlying causes.

What makes brain fog clinically significant is its impact on daily functioning. When a person consistently finds it difficult to hold a conversation, complete a work task, recall recent events, or organise their thoughts, the underlying cause warrants investigation.

What Are the Symptoms of Brain Fog?

Brain fog symptoms can vary between individuals in character and severity. The most consistently reported include:

• Difficulty concentrating — an inability to sustain focus on a task, even a familiar or straightforward one
• Short-term memory impairment — forgetting recent conversations, appointments, or what was just read
• Mental fatigue — a sense of cognitive exhaustion disproportionate to the activity involved
• Slowed thinking and reaction time — taking longer than usual to process information or formulate a response
• Word-finding difficulty — losing words mid-sentence or substituting incorrect words
• Confusion or disorientation — difficulty thinking through problems, following instructions, or making simple decisions
• Lack of mental clarity — a pervasive sense that the mind is clouded or not fully engaged
• Difficulty multitasking — managing more than one cognitive demand simultaneously feels significantly harder than before

These brain fog symptoms frequently co-occur with physical complaints such as fatigue, headaches, disturbed sleep, and low mood, not because the symptoms are imaginary, but because many of the underlying causes affect both physical and cognitive function simultaneously.

What Causes Brain Fog?

The reasons for brain fog are numerous and span several clinical categories. Identifying the underlying cause is essential because treatment depends entirely on what is driving the symptoms.

 Sleep Deprivation and Poor Sleep Quality

The brain consolidates memory, clears metabolic waste, and restores neurotransmitter function during sleep. Consistently inadequate or poor-quality sleep is one of the most common and reversible causes of brain fog. This includes both insufficient total sleep duration and disrupted sleep architecture from conditions such as obstructive sleep apnoea.

Chronic Stress

Prolonged stress keeps the hypothalamic-pituitary-adrenal axis in a state of sustained activation. Elevated cortisol over time impairs the function of the hippocampus and prefrontal cortex, the brain regions most involved in memory and executive function, producing the cognitive dulling characteristic of brain fog.

Nutritional Deficiencies

Deficiencies in vitamin B12, vitamin D, iron, and omega-3 fatty acids are each independently associated with cognitive symptoms. B12 deficiency in particular is a significant cause of brain fog and is especially common among vegetarians, older adults, and individuals on long-term metformin or proton pump inhibitor therapy.

Hormonal Changes

Brain fog in women frequently includes hormonal fluctuations associated with perimenopause, menopause, thyroid dysfunction, and the postpartum period. Oestrogen, thyroid hormones, and progesterone all have direct effects on cognitive function, and their disruption produces characteristic cognitive complaints.

Chronic Medical Conditions

Several medical conditions are associated with brain fog as a feature:

• Hypothyroidism — reduced thyroid hormone slows neurological processing
• Diabetes and blood sugar dysregulation — unstable glucose levels impair neuronal energy metabolism
• Anaemia — reduced oxygen delivery to the brain produces fatigue and cognitive slowing
• Autoimmune conditions — including lupus, multiple sclerosis, and fibromyalgia, which involve neuroinflammatory mechanisms
• Chronic fatigue syndrome (ME/CFS) — brain fog is one of the defining features
• Depression and anxiety — both conditions impair prefrontal function and attention regulation

Post-COVID Brain Fog — A Growing Concern

Since the emergence of COVID-19, brain fog has gained significant attention as a feature of long COVID, the persistence of symptoms beyond the resolution of acute infection, sometimes lasting months or years.

Post-COVID brain fog is now recognised as a distinct clinical phenomenon. Research suggests it may result from several mechanisms, including neuroinflammation triggered by the immune response to the virus, disruption of the gut microbiome and consequent reduction in serotonin production, small-vessel damage affecting cerebral blood flow, and reactivation of latent viruses in a compromised immune environment.

Patients with post-COVID brain fog report difficulty with memory, concentration, word retrieval, and mental stamina that is often disproportionate to other physical recovery. This presentation requires dedicated clinical assessment rather than reassurance that it will resolve on its own.

How Is Brain Fog Diagnosed?

Because brain fog is a symptom cluster rather than a diagnosis, its investigation focuses on identifying the underlying cause. A clinical evaluation typically includes:

• Detailed history — symptom onset, duration, associated complaints, recent infections, medications, sleep patterns, stress levels, and menstrual or hormonal history where relevant
• Blood investigations — full blood count, thyroid function, vitamin B12 and D levels, fasting blood glucose and HbA1c, iron studies, and inflammatory markers
• Neurological assessment — where symptoms are significant, formal cognitive testing may be performed to quantify and characterise the impairment
• Sleep evaluation — where sleep disturbance is a feature, a sleep study may be indicated to assess for obstructive sleep apnoea
• Mental health screening — standardised tools to assess for depression, anxiety, and burnout, which are both causes and consequences of brain fog

An internal medicine specialist is well placed to conduct this initial evaluation, ordering and interpreting the investigations that identify reversible causes of brain fog before more specialist referral is considered.

Brain Fog Treatment and Remedies

Brain fog treatment is directed at the underlying cause. There is no universal pharmacological treatment for brain fog in the absence of an identified driver.

 Addressing Underlying Medical Causes

Where an investigation reveals hypothyroidism, B12 deficiency, anaemia, or blood sugar dysregulation, treating the underlying condition is the most effective brain fog treatment. In most cases, cognitive symptoms improve significantly once the medical issue is corrected.

Sleep Optimisation

Structured sleep hygiene improvements, consistent sleep and wake times, a dark and cool sleeping environment, elimination of screen exposure before sleep, and avoidance of caffeine after midday, address one of the most common and most correctable causes of brain fog.

Dietary and Nutritional Support

A diet rich in whole grains, leafy vegetables, oily fish, eggs, nuts, and seeds provides the nutrients that directly support neurological function. Reducing processed foods, refined carbohydrates, and excessive caffeine intake reduces blood sugar instability and the inflammatory burden that contributes to cognitive impairment.

Physical Activity

Regular aerobic exercise improves cerebral blood flow, promotes the release of brain-derived neurotrophic factor (BDNF), and reduces chronic stress, all of which have direct, measurable effects on cognitive function. Even 30 minutes of moderate activity on most days produces meaningful benefits.

Stress Management

Structured stress reduction, through mindfulness-based practices, cognitive behavioural techniques, or therapeutic support which lowers cortisol burden and restores the prefrontal function that stress suppresses.

Brain Fog Remedies for Daily Management

Practical brain fog remedies for managing symptoms day to day include:

• Breaking complex tasks into smaller, sequenced steps
• Taking regular short breaks during cognitively demanding work
• Writing down important information rather than relying on memory
• Reducing multitasking and information overload
• Maintaining social engagement, which supports cognitive reserve

When Should You See a Doctor for Brain Fog?

Brain fog that is mild, situational, and resolves with rest, sleep, or stress reduction does not necessarily require clinical investigation. However, a doctor should be consulted when:

• Brain fog persists for more than a few weeks without a clear explanatory cause
• Cognitive symptoms are significantly affecting work performance, relationships, or daily function
• Brain fog developed following a COVID-19 infection and has not resolved
• Memory complaints are worsening progressively rather than fluctuating
• Brain fog is accompanied by unexplained fatigue, weight changes, mood disturbance, or neurological symptoms such as headaches, dizziness, or visual changes
• The person is over 60, and the cognitive changes represent a measurable decline from their previous baseline

Symptoms that suggest a neurological rather than systemic cause, such as progressive memory loss, language deterioration, personality changes, or disorientation, warrant prompt evaluation by the best neurologist to exclude conditions such as early cognitive impairment or dementia.

Where brain fog is accompanied by significant low mood, persistent anxiety, or burnout, assessment and management by the best psychiatrist in India ensures that the psychological dimension is addressed as part of a comprehensive care plan.

Conclusion

Brain fog is real and can be deeply frustrating. It is not a sign of laziness, weakness, or being “overly sensitive.” When the mind is consistently not performing at its usual level, when focusing becomes hard work and memory slips start to affect daily life, it is reasonable to look for answers. 

In most cases, brain fog has an identifiable and treatable cause. Addressing nutritional deficiencies, improving sleep, managing stress, treating underlying medical conditions, or reviewing medications can produce meaningful cognitive recovery. What it requires is a structured clinical evaluation rather than continued tolerance of symptoms that affect quality of life.

At Kokilaben Dhirubhai Ambani Hospital, our neurology, internal medicine, and psychiatry teams provide comprehensive assessments for patients experiencing persistent cognitive symptoms. If brain fog has been affecting your daily functioning, a consultation is the first and most productive step toward understanding and resolving it. Book an appointment today.

Frequently Asked Questions

Q1. Is brain fog a symptom of early-stage dementia or Alzheimer’s disease, and how do you tell the difference? 

Brain fog and early dementia can overlap in presentation, but key differences exist. Brain fog is typically fluctuating, often linked to an identifiable cause, and may improve with treatment. Dementia involves a progressive, irreversible decline in multiple cognitive domains. A formal neurological assessment and cognitive testing can differentiate the two.

Q2. Can brain fog be caused by food allergies or intolerances, particularly gluten? 

Yes. Non-coeliac gluten sensitivity and coeliac disease are associated with cognitive symptoms including brain fog, thought to be mediated through intestinal inflammation and neurological effects. Symptoms often improve significantly on a gluten-free diet in confirmed cases.

Q3. How does alcohol contribute to brain fog and does it reverse when you stop drinking? 

Alcohol disrupts sleep architecture, depletes B vitamins, and has direct neurotoxic effects. Regular consumption produces cumulative cognitive impairment. In most cases, brain fog associated with alcohol intake improves meaningfully within weeks of cessation, though recovery time depends on the duration and quantity of use.

Q4. Can children and teenagers experience brain fog, and what are the signs in younger age groups? 

Yes. In younger individuals, brain fog may present as difficulty concentrating in school, poor academic performance, forgetfulness, low motivation, and irritability. Common causes include sleep deprivation, iron deficiency anaemia, anxiety, and, increasingly post-COVID syndrome.

Q5. Does brain fog worsen with age and can it be prevented? 

Brain fog is not an inevitable consequence of ageing, though age-related changes in sleep, hormones, and cardiovascular health can contribute. Consistent physical activity, adequate nutrition, quality sleep, and management of chronic conditions significantly reduce the likelihood of cognitive decline.

Obsessive-compulsive disorder is one of the most frequently misrepresented mental health conditions in everyday language. It is routinely described as a preference for tidiness, a tendency toward perfectionism, or a harmless personality quirk — none of which bear any clinical resemblance to what OCD actually is.

OCD is a serious, chronic mental health condition in which a person becomes trapped in a cycle of unwanted, distressing thoughts and repetitive behaviours they feel compelled to perform — even when those thoughts make no logical sense. The distress it causes is real, and for many people, it consumes hours of every day. Left unaddressed, it progressively affects relationships, work, and quality of life.

This article explains what OCD actually is, how it works, what drives it, and what effective treatment looks like.

What Is OCD?

OCD, in clinical terms, refers to a chronic mental health condition characterised by two defining features: obsessions and compulsions. These two components interact in a self-reinforcing cycle that, without appropriate treatment, tends to worsen over time.

Obsessions are unwanted, intrusive thoughts, images, or urges that enter the mind repeatedly and cause significant anxiety or distress. They are not chosen, not welcome, and not reflective of the person’s actual desires or values. A person with OCD does not want these thoughts — they experience them as invasive and deeply disturbing.

Compulsions are repetitive behaviours or mental acts performed in response to obsessions, with the aim of reducing the anxiety they generate or preventing a feared outcome. The relief compulsions provide is real but temporary. Within a short time, the obsession returns — and the compulsion must be repeated. This is the core of OCD.

What is OCD if not simply anxiety? It is distinguished from general anxiety by the presence of this specific obsession-compulsion cycle, by the ego-dystonic nature of the obsessions, they feel foreign and contrary to the person’s values, and by the time the cycle consumes. DSM-5 criteria require that obsessions and compulsions take up more than one hour per day and cause clinically significant distress or functional impairment.

OCD affects people across all ages, cultures, and levels of education. It commonly begins in childhood, adolescence, or early adulthood. Without treatment, it typically follows a chronic course with periods of exacerbation and partial remission.

The Obsession-Compulsion Cycle — How OCD Actually Works

Understanding the obsession-compulsion cycle is fundamental to understanding why OCD is so difficult to manage without professional support.

The cycle typically operates as follows:

1. Trigger — an internal thought, external situation, or sensory input activates the obsession. The trigger itself may be entirely ordinary — a door handle, a sharp object, or a passing thought.
2. Obsession — the intrusive thought, image, or urge takes hold and generates intense anxiety or discomfort.
3. Interpretation — the person interprets the obsession as meaningful, threatening, or morally significant, amplifying the distress.
4. Compulsion — a behaviour or mental ritual is performed to reduce anxiety, neutralise the thought, or prevent the feared outcome.
5. Temporary relief — the anxiety decreases briefly, reinforcing the compulsion as a coping mechanism.
6. Return of obsession — the obsession returns, often with greater intensity, and the cycle begins again.

Each compulsion prevents the brain from learning that the feared outcome would not have occurred and from experiencing the natural reduction in anxiety that comes from tolerating uncertainty. Over time, obsessions become more frequent, compulsions more elaborate, and the condition more entrenched.

OCD Symptoms — What Obsessions and Compulsions Actually Look Like

OCD symptoms are far more varied than the stereotype of handwashing or tidiness suggests. The content of obsessions reflects whatever a person holds most important or most fears — which is part of what makes them so distressing.

Common Obsession Themes

• Contamination — fear of germs, disease, bodily fluids, or environmental contaminants, even when exposure is objectively minimal
• Harm — intrusive thoughts about accidentally or intentionally hurting oneself or others; fear of being responsible for a catastrophic event
• Symmetry and exactness — a need for things to be arranged or completed in a specific way until they feel “just right”; intense discomfort when they are not
• Unwanted sexual or violent thoughts — disturbing intrusive thoughts completely contrary to the person’s values; distressing precisely because of their nature
• Religious and moral scrupulosity — excessive concern about sin, blasphemy, or having committed a moral wrong; relentless doubt about one’s own character
• Relationship OCD — obsessive doubt about whether one truly loves a partner or whether the relationship is right

Common Compulsion Patterns

• Washing and cleaning — handwashing or cleaning objects and surfaces beyond what hygiene requires
• Checking — repeatedly verifying locks, appliances, or light switches; seeking repeated reassurance that harm has not occurred
• Arranging and ordering — placing objects in specific configurations; repeating actions until they feel symmetrically correct
• Mental rituals — counting, praying, repeating specific words internally, or mentally reviewing events to neutralise a thought
• Avoidance — restructuring daily life to avoid triggers; functionally a compulsion because it maintains the cycle while providing short-term anxiety relief

The Types of OCD Most People Have Never Heard Of

OCD is not a single uniform presentation. Several subtypes are clinically recognised, many of which bear no resemblance to the public image of the condition.

Pure O (Purely Obsessional OCD) A form of OCD in which compulsions are primarily mental rather than behavioural — internal reassurance-seeking, mental reviewing, or thought suppression. The absence of visible rituals leads to significant underdiagnosis.

Scrupulosity OCD Centred on religious or moral perfectionism. The person is tormented by doubt about whether they have sinned or acted immorally — regardless of reassurance or evidence to the contrary.

Relationship OCD (ROCD) Obsessive doubt focused on the validity of a romantic relationship. The person is consumed by questions about whether they truly love their partner, despite having no objective reason to doubt it.

Somatic OCD Excessive preoccupation with body sensations or automatic bodily functions such as breathing, swallowing, heartbeat — that becomes conscious and distressing through focused attention.

PANDAS/PANS-related OCD In some children, OCD symptoms develop or worsen abruptly following a streptococcal infection such as strep throat. This form — Paediatric Autoimmune Neuropsychiatric Disorders Associated with Streptococcal infections — is thought to involve an autoimmune mechanism in which antibodies directed at the streptococcus bacterium cross-react with brain tissue. Assessment of this form may require collaboration between psychiatry and the department of rheumatology or immunology, given its autoimmune underpinning.

What Causes OCD — The Science Behind It

What causes OCD is not a single factor. It arises from the interaction of neurobiological, genetic, and environmental influences.

Neurological basis Neuroimaging consistently identifies abnormalities in circuits connecting the orbitofrontal cortex, anterior cingulate cortex, thalamus, and basal ganglia — a loop involved in decision-making, error detection, and behavioural inhibition. In OCD, this circuit appears hyperactive, generating persistent “error signals” that the brain interprets as requiring a corrective response — the compulsion. Serotonin and glutamate neurotransmitter systems are both implicated in this dysregulation.

Genetic factors OCD runs in families. Having a first-degree biological relative with OCD significantly increases an individual’s risk, particularly if the relative’s onset was in childhood or adolescence. Twin studies confirm a meaningful heritable component, though no single gene has been identified as the definitive cause.

Psychological and environmental factors Early life experiences, including trauma, abuse, neglect, or environments characterised by excessive responsibility or perfectionism — can shape the cognitive patterns that contribute to OCD vulnerability. Stressful life events frequently trigger or exacerbate OCD in individuals with a pre-existing neurobiological predisposition.

OCD Diagnosis — How It Is Formally Assessed

OCD diagnosis is made by a psychiatrist or clinical psychologist using criteria from the Diagnostic and Statistical Manual of Mental Disorders, 5th Edition (DSM-5). There is no blood test or imaging study that confirms OCD.

Diagnostic criteria require:

• The presence of obsessions, compulsions, or both
• Those symptoms consume more than one hour per day or cause significant distress or functional impairment
• That symptoms are not attributable to substances, medications, or another medical condition
• That the presentation is not better explained by another psychiatric condition

Clinical assessment typically includes a structured diagnostic interview, standardised rating scales such as the Yale-Brown Obsessive Compulsive Scale (Y-BOCS), and evaluation of symptom severity and functional impact.

A critical clinical note: the average delay between OCD symptom onset and first clinical contact is seven to ten years. Shame, misattribution of symptoms, and a lack of awareness that what a person is experiencing is OCD, rather than personal weakness, are the primary drivers of this delay. Earlier treatment consistently produces better long-term outcomes.

OCD Treatment — What Actually Works

OCD treatment has a well-established evidence base. While OCD is a chronic condition in most cases, meaningful symptom reduction and functional recovery are achievable for the majority of patients.

Exposure and Response Prevention (ERP) ERP is the gold standard psychological treatment for OCD. It is a structured form of cognitive behavioural therapy in which the patient is progressively exposed to anxiety-provoking stimuli related to their obsessions, while being supported in refraining from the compulsive response. Over repeated exposures, the anxiety generated by the obsession naturally decreases without the compulsion — breaking the reinforcement cycle and restoring the brain’s ability to tolerate uncertainty.

Pharmacotherapy Selective serotonin reuptake inhibitors (SSRIs) — including fluoxetine, sertraline, fluvoxamine, and paroxetine — are the first-line pharmacological agents for OCD. They reduce the intensity and frequency of obsessions and compulsions in a significant proportion of patients. OCD typically requires higher doses than those used for depression, and response develops over a longer timeframe. Clomipramine, a tricyclic antidepressant with strong serotonergic activity, is used when SSRIs are insufficient.

Combined treatment The combination of ERP and pharmacotherapy produces better outcomes than either approach alone for most patients with moderate to severe OCD.

Advanced interventions for treatment-resistant OCD For patients who do not respond adequately to multiple treatment trials, augmentation strategies including antipsychotic addition, intensive ERP programs, transcranial magnetic stimulation (TMS), and, in carefully selected cases, deep brain stimulation are considered. The best neuro rehabilitation centre in India, with expertise in treatment-resistant psychiatric conditions and neurostimulation, provides the most structured pathway for patients whose OCD has not responded to standard treatment.

For initial assessment, accurate diagnosis, and development of a comprehensive OCD treatment plan, consultation with the best psychiatrist in India with specialist expertise in OCD and anxiety disorders is the most important first step.

Common OCD Myths — Formally Debunked

Myth: OCD is about being clean or organised OCD can involve contamination themes, but the majority of OCD presentations have nothing to do with cleanliness. Harm, religion, relationships, intrusive thoughts, and somatic preoccupations are equally common — and far less visible.

Myth: People with OCD can just stop if they try hard enough Compulsions are not choices. They are driven by intense anxiety and reinforced by temporary relief. Willpower alone does not break the obsession-compulsion cycle — structured treatment does.

Myth: OCD is caused by poor parenting or weak character OCD is a neurobiological condition with identifiable brain circuit abnormalities and a genetic component. It is not a reflection of character, willpower, or upbringing.

Myth: OCD always involves visible rituals Many people with OCD perform purely mental compulsions — internal reviewing, reassurance-seeking, thought suppression — with no visible behavioural signs. These presentations are frequently missed or misdiagnosed.

Myth: OCD is rare OCD affects approximately one to two percent of the global population, making it one of the more prevalent mental health conditions worldwide. It is underdiagnosed, but not uncommon.

Conclusion

OCD is not a personality trait. It is not a preference for tidiness, a tendency toward perfectionism, or a sign of being detail-oriented. It is a clinically significant, neurologically grounded condition that traps individuals in a cycle of distressing intrusive thoughts and time-consuming compulsive behaviours — a cycle that, without appropriate treatment typically intensifies over time.

The most important clinical message is this: OCD is treatable. Exposure and Response Prevention therapy, pharmacological intervention, and where needed, advanced neurostimulation approaches produce meaningful recovery for the majority of patients. The barrier is rarely the availability of treatment — it is the delay in reaching it.

If you or a family member is experiencing intrusive thoughts, repetitive behaviours, or a pattern of anxiety-driven rituals that is consuming time and interfering with daily life, a clinical evaluation is the right next step. At Kokilaben Dhirubhai Ambani Hospital, our psychiatry team provides specialist assessment and evidence-based management for OCD across all age groups and presentations. Book a consultation today.

Frequently Asked Questions

Q1. Can OCD develop suddenly in adulthood with no prior history — and what usually triggers it? 

Yes. While OCD most commonly begins in childhood or early adulthood, new onset in later adulthood does occur. Common triggers include significant life stressors, bereavement, childbirth (postpartum OCD), major health events, and in some cases, neurological illness or infection.

Q2. Is OCD more common in men or women — and does it present differently across genders? 

OCD affects men and women at roughly equal rates overall. Men tend to develop it earlier — in childhood or adolescence — while women more commonly develop it in early adulthood. Contamination and checking themes are somewhat more prevalent in women; symmetry and forbidden thought themes are somewhat more common in men.

Q3. Can OCD go into remission on its own — and what causes it to flare up? 

Partial remission can occur, particularly in adolescence, but full spontaneous resolution without treatment is uncommon. Flare-ups are typically associated with stress, major life transitions, sleep disruption, illness, or hormonal changes.

Q4. How does OCD affect children — and how do parents recognise it versus normal childhood anxiety? 

OCD in children often presents as avoidance of specific situations, elaborate bedtime rituals, repeated reassurance-seeking, or sudden deterioration in school performance. Normal childhood anxiety is typically transient and proportionate. OCD is persistent, time-consuming, and significantly distressing, and the child is usually aware that their thoughts or behaviours are not quite right.

Q5. Is there a connection between OCD and gut health — and does nutrition affect OCD severity? 

Emerging research suggests a gut-brain axis connection, with gut microbiome composition potentially influencing serotonin production and neuroinflammatory pathways relevant to OCD. While nutrition is not a treatment for OCD, diets that support gut health and reduce systemic inflammation may complement clinical management. This remains an active area of research rather than established clinical guidance.